Sen. Claire McCaskill (D-MO) greets supporters during an election night party November 6, 2012 in St. Louis, Missouri. McCaskill defeated Rep. Todd Akin (R-MO) for the Missouri U.S. Senate seat. McCaskill won in her re-election bid against U.S. Rep. Todd Akin (R-MO) for the Missouri U.S. senate seat.

Sen. Claire McCaskill (D-MO) greets supporters during an election night party November 6, 2012 in St. Louis, Missouri. McCaskill defeated Rep. Todd Akin (R-MO) for the Missouri U.S. Senate seat. McCaskill won in her re-election bid against U.S. Rep. Todd Akin (R-MO) for the Missouri U.S. senate seat.

Sen. Claire McCaskill (D-MO) acknowledges her recently deceased mother, Betty Anne McCaskill, as she speaks to supporters next to her husband, Joseph Shepard (L), during an election night party November 6, 2012 in St. Louis, Missouri. McCaskill defeated Rep. Todd Akin (R-MO) for the Missouri U.S. senate seat.

Sen. Claire McCaskill (D-MO) acknowledges her recently deceased mother, Betty Anne McCaskill, as she speaks to supporters next to her husband, Joseph Shepard (L), during an election night party November 6, 2012 in St. Louis, Missouri. McCaskill defeated Rep. Todd Akin (R-MO) for the Missouri U.S. senate seat.

Sens. McCaskill And Ayotte Discuss Additional Measures To Curb Sexual Assaults In Military

Chip Somodevilla

Sen. Claire McCaskill (D-MO) (L) and Sen. Kelly Ayotte (R-NH) hold a briefing with reporters at the U.S. Capitol February 6, 2014 in Washington, DC. Both former prosecutors, the senators talked to reporters ahead of a potential renewed Senate floor debate over additional measures to curb rapes and sexual assaults in the military.

Sen. Claire McCaskill (D-MO) (L) and Sen. Kelly Ayotte (R-NH) hold a briefing with reporters at the U.S. Capitol February 6, 2014 in Washington, DC. Both former prosecutors, the senators talked to reporters ahead of a potential renewed Senate floor debate over additional measures to curb rapes and sexual assaults in the military.

Sen. Claire McCaskill (D-MO) questions witnesses about military equipment given to local law enforcement departments by the federal government during a Senate Homeland Security and Governmental Affairs Committee hearing about at the Dirksen Senate Office Building on Capitol Hill September 9, 2014 in Washington, DC. In the wake of the Ferguson, MO, police response to peaceful protests, senators on the committee were critical of the federal grant programs that allow local and state law enforcement agencies to buy armored vehicles, assult rifles, body armor and other military equipment.

Sen. Claire McCaskill (D-MO) questions witnesses about military equipment given to local law enforcement departments by the federal government during a Senate Homeland Security and Governmental Affairs Committee hearing about at the Dirksen Senate Office Building on Capitol Hill September 9, 2014 in Washington, DC. In the wake of the Ferguson, MO, police response to peaceful protests, senators on the committee were critical of the federal grant programs that allow local and state law enforcement agencies to buy armored vehicles, assult rifles, body armor and other military equipment.

Senators Discuss Reforms To Combat Military Sexual Assaults

Allison Shelley

Sen. Claire McCaskill (D-MO) speaks at a news conference July 25, 2013 on Capitol Hill in Washington, D.C. Sen. McCaskill appeared with Sen. Kelly Ayotte (R-NH) (C), Sen. Jon Tester (D-MT) (R) and a group of retired female service members to discuss '...the historic and bipartisan reforms approved by the Senate Armed Services committee to combat military sexual assaults.'

Sen. Claire McCaskill (D-MO) speaks at a news conference July 25, 2013 on Capitol Hill in Washington, D.C. Sen. McCaskill appeared with Sen. Kelly Ayotte (R-NH) (C), Sen. Jon Tester (D-MT) (R) and a group of retired female service members to discuss '...the historic and bipartisan reforms approved by the Senate Armed Services committee to combat military sexual assaults.'

Senators Discuss Reforms To Combat Military Sexual Assaults

Allison Shelley

Sen. Claire McCaskill (D-MO) speaks at a news conference July 25, 2013 on Capitol Hill in Washington, D.C. Sen. McCaskill appeared with Sen. Kelly Ayotte (R-NH), Sen. Jon Tester (D-MT) and a group of retired female service members to discuss '...the historic and bipartisan reforms approved by the Senate Armed Services committee to combat military sexual assaults.'

Sen. Claire McCaskill (D-MO) speaks at a news conference July 25, 2013 on Capitol Hill in Washington, D.C. Sen. McCaskill appeared with Sen. Kelly Ayotte (R-NH), Sen. Jon Tester (D-MT) and a group of retired female service members to discuss '...the historic and bipartisan reforms approved by the Senate Armed Services committee to combat military sexual assaults.'

Senate Holds Hearing On Oversight Of Reconstruction Contracts In Afghanistan

Brendan Smialowski

Subcommittee chairman Senator Claire McCaskill (D-MO) speaks during a hearing of the Senate Homeland Security and Governmental Affairs Committee's Contracting Oversight Subcommittee on Capitol Hill November 18, 2010 in Washington, DC. The subcommittee held the hearing about contracts and the role of the Special Inspector General in Afghanistan.

Subcommittee chairman Senator Claire McCaskill (D-MO) speaks during a hearing of the Senate Homeland Security and Governmental Affairs Committee's Contracting Oversight Subcommittee on Capitol Hill November 18, 2010 in Washington, DC. The subcommittee held the hearing about contracts and the role of the Special Inspector General in Afghanistan.